The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 1990
Filed:
Apr. 15, 1988
Theron L Ellis, Vestal, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for making flush circuit laminates for use in constructing a multilayer circuit board is disclosed. The method comprises laminating together a dielectric sheet(s) of material, such as glass cloth impregnated with epoxy resin, placed between predrilled or pre-punched sheets of a conductive material, such as copper, to form the desired flush circuit laminate, such as a flush surface power core, which, in turn, may be used with other laminates to construct the desired multilayer circuit board. This method allows thinner laminates to be made with acceptable dimensional tolerances which provides improved impedance characteristics compared to laminates made using conventional processes. Thus, the method provide a method of making a more compact, higher speed multilayer circuit board without sacrificing circuit density on the circuit board. If desired, the method may be carried out using all dry processes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile